Fault 70 Safe brake system

Response: FS – warning

Cause

Measure

Enable signal revoked during safe brake test.

Make sure that the enable signal is active during the safe brake test.

Response: FS – warning

Cause

Measure

Basic unit requested brake application during safe brake test.

Make sure that no drive function is activated or no axis is in fault status.

Response: FS – warning

Cause

Measure

Instance of safety sub-functions STO, SOS, SSx, SSR, SLI or SLP activated during safe brake test.

Make sure that no safety sub-function is activated during the safe brake test (only SLS, SSM are permitted).

Response: FS – warning

Cause

Measure

Measured load torque outside configured tolerance.

Make sure that the load torque deviates only by the configured tolerance value.

Response: FS – warning

Cause

Measure

Basic unit does not deliver parameterized test torque.

– Check the parameter setting of the device and adjust if necessary.

– Make sure that the device has enough power for the test torque.

Response: FS – warning

Cause

Measure

Upper limit of configured test range exceeded during safe brake test.

– Configure a sufficiently large test range (test distance > retraction distance).

– Set the test direction properly.

– Make sure that the movements can be performed and the system does not slip.

Response: FS – warning

Cause

Measure

Lower limit of configured test range exceeded during safe brake test.

– Configure a sufficiently large test range (test distance > retraction distance).

– Set the test direction properly.

– Make sure that the movements can be performed and the system does not slip.

Response: FS – warning

Cause

Measure

Measured retraction distance differs from parameterized retraction distance by more than "Distance tolerance positioning" parameter.

– Check the parameter setting of the device and adjust if necessary.

– Check the value of parameter "Distance tolerance positioning" and increase if necessary.

– Make sure the device has enough power for the test torque.

Response: FS – warning

Cause

Measure

FCB BDS in basic unit returned unexpected value. Device cannot reach configured load torques or cannot maintain position.

Do not activate higher-priority FCB BDS in the basic unit during the safe brake test.

Response: FS – warning

Cause

Measure

Faulty communication with basic unit.

– Repeat the test.

– If the fault occurs repeatedly, replace the safety card and send it together with the fault number to SEW-EURODRIVE. For further support, contact SEW-EURODRIVE Service.

Response: FS – warning

Cause

Measure

None of the safe digital outputs F-DO is set to brake control.

– Check the parameter setting of the safety card.

– Activate the SBC drive safety function on one of the safe digital outputs F-DO.

– Connect the brake rectifier at the same output channel F-DO (e.g. SBM drive safety function).

Response: FS – warning

Cause

Measure

Maximum movement permitted at standstill exceeded.

Brake no longer holds torque or device cannot hold load.

– Check the position tolerance and correct if necessary.

– Make sure the device delivers the required braking torque.

Response: FS – warning

Cause

Measure

Speed greater than parameterized minimum speed detected at end of retraction positioning.

– Check the parameter setting of the device and adjust if necessary.

– Make sure the device is not subject to overload.

Response: FS – warning

Cause

Measure

After ready signal from the basic unit (drive at standstill), a speed greater than the parameterized minimum speed has been detected.

Check the minimum speed, and adjust if necessary.

Response: FS – warning

Cause

Measure

Torque specified by basic unit has wrong effective direction for current test step.

– Check the parameter setting of the device and adjust if necessary.

– Make sure that direction of rotation reversal is correct.

Response: FS – system error

Cause

Measure

Safety card parameterized again using Assist CS.. tool while safe brake test is running.

– Acknowledge the fault.

– Start the safe brake test again.

– Do not set the parameters of the safety card during the safe brake test.

Response: FS – system error

Cause

Measure

Fault acknowledged during safe brake test.

Deactivate the brake test before acknowledging the fault.

Response: FS – system error

Cause

Measure

Limit violation signaled by drive safety function active at the same time (e.g. SLS) during safe brake test.

– Use the fault memory to check which drive safety function signaled a limit violation.

– Refer to the measures in the fault description to eliminate the fault.

Response: FS – warning

Cause

Measure

Fault detected by safety card during safe brake test.

– Use the fault memory to check which fault occurred at the same time.

– Refer to the measures in the fault description to eliminate the fault.

Response: FS – system error

Cause

Measure

No torque or insufficient values measured during load torque test.

– Deactivate the load torque test. To do so, set the load torque for horizontal applications to "0".

– Increase the test duration.

Response: FS – warning

Cause

Measure

No braking torque or insufficient values measured during safe brake test.

– Extend the test duration.

– If the fault occurs repeatedly, replace the device and send it together with the error number to SEW-EURODRIVE. For further support, contact SEW-EURODRIVE Service.

Response: FS – warning

Cause

Measure

The parameters "Duration of torque buildup" and "Duration of torque reduction" require an inverter firmware from version V 6.00.

– Set both parameters to the value "0".

– Update the firmware.